0LD140SR-1-SD-25/14-20 hydraulic cylinder

According to the model 0LD140SR-1-SD-25/14-20 you provided, combined with the hydraulic cylinder industry naming rules and common technical logic, the following is a comprehensive analysis of the technical parameters and application interpretation：
Core parameter analysis
Cylinder diameter (Piston Diameter)
140: Piston diameter ≈140mm (size of key pressure bearing parts).
Piston rod diameter (Rod Diameter)
25: The diameter of the piston rod is ≈25mm (the ”25/” part of the model).
Stroke (Stroke)
14-20: Stroke range 14mm~20mm (short stroke design, suitable for precision control scenarios).
Pressure level
Rated pressure: usually 16~21 MPa (industry standard), thrust calculation：
Thrust (F) = pressure (P) × piston area (A)
When the pressure is 16MPa: thrust ≈ 3.14×(140/2)2×16 ≈ 24.6 tons
When the pressure is 20MPa: thrust ≈ 30.7 tons
Withstand pressure test pressure: ≥1.25 times the rated pressure (if the rated pressure is 16MPa, the test pressure is ≥20MPa).
Type and seal
SR: It may mean double-acting Single rod (Double-acting Single Rod).
Sealing system: Combination of Ste seal (piston rod seal) + gray ring (piston seal), withstand pressure ≥25MPa, applicable temperature range -30℃~+110℃.
Starting pressure: ≤0.5MPa (high-precision sealing design).

Key performance indicators
Project parameters/requirements
Leakage ≤5 drops/min (under rated pressure)
Durability ≥1 million cycles (ISO 10100 standard)
Buffer design is optional (short stroke needs to prevent end impact)
Installation method Flange type (SD may indicate standard flange installation)

Application scenarios and precautions
Typical use
Short-stroke high-precision scenarios such as machine tool positioning and locking, mold clamping, and precision stroke control of stamping machinery.
Installation warning
Coaxiality deviation: ≤0.1mm/m needs to be controlled to prevent the piston rod from bending (short stroke is sensitive to partial load).
Support reinforcement: If installed vertically, the guide bracket needs to be added (to avoid bending the piston rod by its own weight).
Maintenance focus
Pollution control: The cleanliness of the oil must reach NAS 1638 Class 8 (particles ≤25µm).
Seal replacement: Mark the opening direction of the PTFE slip ring when disassembling (misplaced installation causes leakage).
Troubleshooting quick look-up table
Solutions to possible causes of failure
Insufficient thrust, insufficient system pressure/seal failure, detection of pump pressure, replacement of seals
Crawling or shaking mixed with air/guide sleeve wear exhaust, check coaxiality
Leaking piston rod scratched/sealed aging polished rod surface, replacement seal
Alternative model reference
If you need localized replacement or spot purchase, you can search for the following equivalent models：
HOB 140×25/20-16 (Rexroth compatible series)
YHG1-J140E (domestic engineering cylinder, customized stroke required)
Platform recommendation: 1688 hydraulic cylinder area (filter cylinder diameter 140mm, stroke ≤50mm)